Mandy Moore's complete style transformation: from plaid skirts to red carpet goddess

True fans of Mandy Moore have followed the performer's nearly 20-year career long before she snagged the title role of Rebecca Pearson on NBC's tear-jerker "This is Us."

She's been gracing the red carpet since 1999, when she stole hearts as a fresh-faced teenage pop singer, eventually venturing onto the big screen as antagonist Lana in "The Princess Diaries," and the lovable Jamie in "A Walk to Remember." 

Mandy Moore's Style Transformation
See Gallery
Mandy Moore's Style Transformation

We think Mandy should be wearing this outfit to an Easter brunch, rather than the 10th Annual Billboard Music Awards in December!

Mandy goes casual with these metallic pants for the 13th Annual Kids Choice Awards.
The Billboard Music Awards call for a simple red dress and matching peep-toe pumps.
We're not too sure about this outfit Moore chose for the 27th Annual People's Choice Awards...
Mandy attended the MTV Movie Awards in this short pastel dress.
We're loving the darker tresses on Ms. Moore, pictured here at the Billboard Music Awards.
At the "A Walk To Remember" Premiere, we're not sure why Mandy chose this drop-waisted dress with chunky belt, but we love how her hair is styled!
Mandy is seen at the 2002 MTV Movie Awards with much shorter hair!
Mandy was glowing and tanned for the Elton John AIDS Foundation's 11th Annual Oscar party co-hosted by In Style and AOL.
We might not go for the shoes, but we're loving this striped dress on Mandy at the Billboard Music Awards.
Moore looked stunning in this plum gown at the Costume Institute Gala.
Mandy shows off the low back of her dress at the premiere of "Saved."
Arriving at the MTV Movie Awards, Mandy's tan skin matches the hue of her gold gown!
Mandy attends the American Music Awards in a bold, bright gown.
Mandy attends the CFDA Fashion Awards in a dress resembling a black and white paisley design.
Back to blonde for Mandy, wearing an interesting black dress to a TV Guide Party following the Emmy Awards.
Mandy goes brunette yet again, wearing this cream dress to the Miss Davenporte Trunk Show hosted by Lucky Magazine.
Mandy wore a classic black gown to the 63rd Annual Golden Globe Awards.
Mandy tones down the sexiness of a keyhole neckline by sporting long sleeves at the Conde Nast Traveler Hot List Party.
Sporting one of our favorite looks (with pockets!), Mandy looked gorgeous at the 2006 Costume Institute Gala at the Met.
Mandy chose a bright cobalt dress for the Cartier holiday celebration in Short Hills, NJ.
Moore chose a neutral patterned gown with gold accessories for the 2007 GRAMMY Awards.
Mandy Moore performed at an Oxygen Network taping in this emerald long-sleeved dress.
Mandy attended the Herve Leger show at Fall 2008 New York Fashion Week, wearing a fitted bandage dress.
Mandy looked stunning in a strapless gown with an embellished bodice at the 2008 CFDA Fashion Awards.
We love throwing a blazer over an outfit, so we're big fans of what Mandy wore to this H&M shopping event.
Those. Shoes. Mandy's hair might be shorter (and a different color!) but we can't tear our eyes away from her gorgeous pumps!
Mandy wore a vintage-inspired dress and another pair of to-die-for shoes to the Madison & Diavolina Launch Party.
Moore keeps the look classy and balanced by showing off her tanned legs in a short skirt, but keeping long sleeves on top of this fun dress at the 2010 AMA's.
We love everything about this one-shouldered tulle gown - from the fit to the color, it's beautiful.
In one of the most talked about gowns to date, Mandy graced the red carpet of the 83rd Annual Academy Awards in this romantic Monique Lhuillier gown that looks to be made solely for her.
Mandy attended the The L'Oreal National Movie Awards in London, wearing a long flowing gown.
We're loving the dress Moore chose for the Lela Rose Spring 2012 fashion show, and the accompanying necklace is perfection!
Every stylish girl loves a pop of color, and Mandy is no different.  Keeping her shoes and makeup neutral, she pulls off the look with grace.
Moore's shoulders were attention-grabbing at the 2012 CFDA Fashion Awards in this embellished gown.
Moore attends an event she co-hosted with Dove, called "Women Who Should Be Famous" in this lovely white and cream outfit.
Mandy made this bright dress rocker-chic by pairing it with a leather jacket and flat boots.
Mandy was a showstopper at the Veuve Clicquot Polo Classic in L.A., wearing a vibrant lace Lela Rose dress.

Moore is the epitome of glamour in this bold gown, and we're just dying to know how we can get those gorgeous voluminous waves for ourselves!

Mandy Moore proves that a leather jacket spices up any look. 
A simple LBD can go a long way, especially on the red carpet. Plus, look at that smokey eye! 
When it comes to the Veuve Clicquot Polo Classic, pastels are the way to go. 
Mandy shone in a pastel blue dress with a pop of color on her lips. 
Moore added a simple white blazer to her already chic jumpsuit for a red carpet appearance. 
Another leather winner for Moore! 
Moore added a red clutch to a simple black jean and leather jacket getup for a New Balance event. 
Black and white seems to be the actress' go-to color in the recent months. 
Mandy Moore attends the Entertainment Weekly and People New York Upfronts Celebration in a chic red jumpsuit. 
A casual shirt, pencil skirt and white heels makes for the perfect pairing. 
It's back to the (business) basics for Mandy Moore. We're loving the red addition! 
Moore tests out a bold yellow dress for the 2016 Emmys -- a winner in our book! 
Moore opts for an off-the-shoulder black number for a Vanity Fair event with NBC>
We're loving this navy Solace dress on the actress! Minimal jewelry and makeup are the way to go when wearing a dress like this. 
This might be our favorite look on the actress, who dominated the 2017 Golden Globes in this slinky black number.
Mandy Moore opts for a one-shoulder leopard print for a summer red carpet appearance. 
Another animal print! She opted for a bold look for the annual CFDA Awards.  
Mandy definitely had "princess" on her mind at this D23 expo. 
We can't get over how gorgeous the star looked in Carolina Herrera for the 2017 Emmy Awards. 
The star opted for a bold orange and navy printed frock for the premiere of the second season of "This is Us."
Bold makeup and chic studded shoes perfectly complemented her long-sleeved white dress. 
For the 24th annual Screen Actors Guild Awards, the actress opted for a shimmery silhouette from Ralph Lauren Collection. 
It's back to black and white for Moore, who accentuated her outfit with a bold lip.
The actress showed off her rocker side in this edgy silver mini dress by Alberta Ferretti.  
Moore opted for an '80s inspired blue leather dress by designer Isabel Marant. 

Mandy Moore attends the premiere of NBC's 'This Is Us' Season 3 at Paramount Studios in a long red and black printed gown.

Mandy Moore attends The Dujour Magazine Cover in NYC wearing a structural white dress paired with simple black sandals.
Mandy Moore wore a red dress with a cape-like sleeve detail and minimal bow at the waist.
Moore wore a red dress with a pleated skirt, plunging neckline and detailed sleeves.
Mandy Moore attends the Eddie Bauer Kicks Off Holiday Adventure Campaign In Los Angeles.
Mandy Moore attends The Hollywood Reporter's Power 100 Women In Entertainment at Milk Studios in Los Angeles.
Mandy Moore attends the 25th Annual Screen Actors Guild Awards wearing a gown from Jason Wu Collection. 

Mandy Moore opted to wear a stunning custom Michael Kors gown with side cutouts and a belt to the 2019 Critic's Choice Awards.

Mandy Moore wore a tan Emilia Wickstead dress and satin Christian Louboutin pumps to a ceremony presenting her star on the Hollywood Walk of Fame. She paired the dress with a teal jacket.
Mandy Moore is honored with a star on The Hollywood Walk Of Fame.
Mandy Moore attends Hotel Vivier Los Angeles at Private Residence wearing a high neck dress with an asymmetrical skirt and gold accents. 

Moore's transition from recording artist to movie star and now television queen all while maintaining her place as one of Hollywood's favorite sweethearts saw her succumb to fashion's most unfortunate trends --turtlenecks and plaid skirts, oversized belts and bubble dresses. But the actress, now 34, has emerged fashion- scandal free. 

Her love for 70s-inspired prints, floppy hats and boho silhouettes is apparent. But as she solidifies herself as one of televisions most sought-after stars, her frequent (sophisticated and chic) red carpet appearances continue to blow us away. 

Moore at the 2017 Golden Globes in Naeem Khan (Getty)

Dabbling in high-end designers such as Monique Lhuillier (that princess-inspired frock worn to the 83rd Oscars is one of our favorites), Solace (she bared all in a cut-out dress at the 2016 Critic's Choice Awards) and Carolina Herrera (which she donned at the 2017 Emmys), Moore has proven she's a fashion force to watch out for.

Scroll through above to see the star's full style transformation! 

Read Full Story